I think the answer is: growing isolation in the suburbs
Physical safety would mean that you are putting yourself out of harm's way. Hence, this can be linked to isolation in the suburbs. A lot of harm can be present in suburb communities especially at night. This may be the motivation why the characters have to distance themselves from harm in the suburbs.
Along the way he develop, M.C.M.I (Million Clinical Multiaxial Inventory) it had become commonly used for diagnostic assessment for personality problems. It’s used widely, now in its 3rd edition, MCMI-III.
The answer is A. Rainstorms hears gunshots.